Physics

Problem

A stone tied to a string is whirled in a horizontal circle of radius

0.40\,\text{m}

and completes one revolution in

0.50\,\text{s}

. The linear speed of the stone is closest to a)

6.3\,\text{m s}^{-1}

5.0\,\text{m s}^{-1}

2.5\,\text{m s}^{-1}

3.2\,\text{m s}^{-1}